Republican Gov. Chris Christie and state Sen. Barbara Buono (D-Middlesex) have both filed petitions to run for governor. Star-Ledger file photo

TRENTON — Gov. Chris Christie and his inevitable Democratic challenger, state Sen. Barbara Buono, have filed petitions to run for governor in the June 4 primary elections, the state Division of Elections website showed today.

The petitions filed by Christie, the Republican incumbent, had 11,607 signatures compared with 5,836. for Buono, with both far exceeding the required 1,000 names. The figures are preliminary, and await confirmation by the state.

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While other candidates, Democratic and Republican alike, are expected to file by the Monday deadline, Christie and Buono are the only two to file to date, so far to run in the primary. However, any opposition is not expected to be significant.

So far, the candidates have focused on amassing as much cash as they can while reaping endorsements. Christie, who has declined to take matching funds in the primary, has raised more than $5 million. After receiving two-for-one matching funds for the state, Buono currently has about $1 million in the bank.

Both candidates rolled out new endorsements yesterday, with Buono touting the support of the Rutgers University faculty union, the AAUP-AFT , Christie the backing of the New Jersey Career Fire Chief’s Association.